Method for wireless charging, transmitter, receiver and power management apparatus

ABSTRACT

A method, a transmitter, a receiver, and a power management apparatus are provided for wireless charging. The method may include: acquiring, in response to an establishment of a connection from the wireless charging transmitter to a charger, voltage and current capability information of the charger; determining, in response to fast wireless charge identification information received from a wireless charging receiver, acknowledgment information corresponding to the fast wireless charge identification information according to the voltage and current capability information of the charger; sending the acknowledgment information to the wireless charging receiver; and requesting, in response to a charging request including desired voltage information and desired current information received from the wireless charging receiver, the charger for a voltage and a current corresponding to the desired voltage information and the desired current information, respectively.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims priority to Chinese PatentApplication No. 201710756020.5, filed Aug. 29, 2017, the entire contentsof which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the field of charging technologies,and in particular, to a method for wireless charging, a transmitter, areceiver, and a power management apparatus.

BACKGROUND

Wireless charging technologies, especially wireless chargingtechnologies of Wireless Power Consortium (WPC), are increasingly usedin mobile terminals. For example, wearable devices have widely used thewireless charging technologies, and some phones also use the WPCwireless charging technology for charging. The USB PD (Universal SerialBus Power Delivery) protocol is a protocol standardized by the USBAssociation to support more powerful charging. With the USB PD protocoland the Type C interface increasingly used in the mobile terminals, thechargers supporting the USB PD also become more and more popular.

In the related art, some wireless charging technologies support acharger with a Dedicated Charge Port (DCP). In such case, the wirelesscharging transmitter and the charger need to perform a Battery ChargingSpecification 1.2 (BC1.2) protocol detection, and the input voltagesupported by BC1.2 is only 5V. When using the voltage of 5V forcharging, the charging power is limited. Some of the other wirelesscharging technologies support fixed voltage inputs, such as 9V or 12V.There are also some wireless charging technologies in which an encryptedauthentication is performed between the wireless charging receiver (Rx)and the wireless charging transmitter, and fast wireless charging startsif the encryption authentication is passed. However, a large number ofchargers on the market do not support the method of using a fixedvoltage or using an encryption.

SUMMARY

The present disclosure provides a method for wireless charging, atransmitter, a receiver, and a power management apparatus.

According to a first aspect of the present disclosure, there is provideda method for wireless charging. The method is applied to a wirelesscharging transmitter, and includes: when detecting that a connection isestablished between the wireless charging transmitter and a charger,acquiring voltage and current capability information of the charger;when receiving fast wireless charge identification information from awireless charging receiver, determining acknowledgment informationcorresponding to the fast wireless charge identification informationaccording to the voltage and current capability information of thecharger; sending the acknowledgment information to the wireless chargingreceiver; and, when receiving a charging request including desiredvoltage information and desired current information from the wirelesscharging receiver, requesting the charger for a voltage and a currentrespectively corresponding to the desired voltage information and thedesired current information.

According to a second aspect of the present disclosure, there isprovided a method for wireless charging. The method is applied to awireless charging receiver, and includes: forwarding, in response tofast wireless charge identification information received from a powermanagement apparatus, the fast wireless charge identificationinformation to a wireless charging transmitter; forwarding, in responseto acknowledgment information received from the wireless chargingtransmitter in response to the fast wireless charge identificationinformation, the acknowledgment information to the power managementapparatus; and forwarding, in response to a charging request receivedfrom the power management apparatus in response to the acknowledgmentinformation, the charging request to the wireless charging transmitter.

According to a third aspect of the present disclosure, there is provideda method for wireless charging. The method is applied to a powermanagement apparatus, and includes: sending, in response to detecting afirst voltage input, fast wireless charge identification information toa wireless charging receiver; determining a charging request based onacknowledgment information received from the wireless charging receiver,wherein the acknowledgment information is generated by the wirelesscharging receiver in response to the fast wireless charge identificationinformation; sending the charging request to the wireless chargingreceiver; and setting an input current of the power management apparatusaccording to the charging request and a charging efficiency.

According to a fourth aspect of the present disclosure, there isprovided a wireless charging transmitter. The wireless chargingtransmitter may include: an acquisition module, a first determiningmodule, a first sending module, and a first requesting module. Theacquisition module is configured to, in response to an establishment ofa connection from the wireless charging transmitter to a charger,acquire voltage and current capability information of the charger. Thefirst determining module is configured to, in response to fast wirelesscharge identification information received from a wireless chargingreceiver, determine acknowledgment information corresponding to the fastwireless charge identification information according to the voltage andcurrent capability information of the charger. The first sending moduleis configured to send the acknowledgment information to the wirelesscharging receiver. The first requesting module is configured to, inresponse to a charging request received from the wireless chargingreceiver in response to the acknowledgment information, request thecharger for a voltage and a current corresponding to the chargingrequest.

According to a fifth aspect of the present disclosure, there is provideda wireless charging receiver. The wireless charging receiver mayinclude: a first forwarding module, a second forwarding module, and athird forwarding module. The first forwarding module is configured to,in response to fast wireless charge identification information receivedfrom a power management apparatus, forward the fast wireless chargeidentification information to a wireless charging transmitter. Thesecond forwarding module is configured to, in response to acknowledgmentinformation received from the wireless charging transmitter in responseto the fast wireless charge identification information, forward theacknowledgment information to the power management apparatus. The thirdforwarding module is configured to, in response to a charging requestreceived from the power management apparatus in response to theacknowledgment information, forward the charging request to the wirelesscharging transmitter.

According to a sixth aspect of the present disclosure, there is provideda power management apparatus, including: a second sending moduleconfigured to, in response to detecting a first voltage input, send fastwireless charge identification information to a wireless chargingreceiver; a second determining module configured to determine a chargingrequest based on acknowledgment information received from the wirelesscharging receiver, wherein the acknowledgment information is generatedby the wireless charging receiver in response to the fast wirelesscharge identification information; a third sending module configured tosend the charging request to the wireless charging receiver; and asetting module configured to set an input current of the powermanagement apparatus according to the charging request and a chargingefficiency.

According to a seventh aspect of the present disclosure, there isprovided a wireless charging transmitter, including: a processor; and amemory for storing instructions executable by the processor, wherein theprocessor is configured to perform the steps in the method for wirelesscharging according to the first aspect.

According to an eighth aspect of the present disclosure, there isprovided a wireless charging receiver, including: a processor; and amemory for storing instructions executable by the processor, wherein theprocessor is configured to perform the steps in the method for wirelesscharging according to the second aspect.

According to a ninth aspect of the present disclosure, there is provideda power management apparatus, including: a processor; and a memory forstoring instructions executable by the processor, wherein the processoris configured to perform the steps in the method for wireless chargingaccording to the second aspect.

According to a tenth aspect of the present disclosure, there is provideda computer-readable storage medium having stored thereon a computerprogram, wherein the computer program, when executed by a processor,carries out the steps in the method for wireless charging according tothe first aspect.

According to an eleventh aspect of the present disclosure, there isprovided a computer-readable storage medium having stored thereon acomputer program, wherein the computer program, when executed by aprocessor, carries out the steps in the method for wireless chargingaccording to the second aspect.

According to a twelfth aspect of the present disclosure, there isprovided a computer-readable storage medium having stored thereon acomputer program, wherein the computer program, when executed by aprocessor, carries out the steps in the method for wireless chargingaccording to the third aspect.

According to a thirteenth aspect of the present disclosure, there isprovided a wireless charging system, where the wireless charging systemincludes a wireless charging transmitter and a power managementapparatus.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary only and are notrestrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of this specification, illustrate embodiments consistent with thepresent disclosure and, together with the description, serve to explainthe principles of the present disclosure.

FIG. 1 is a schematic diagram of a wireless charging system according toan aspect of the disclosure.

FIG. 2 is a flowchart of a method for wireless charging according to anaspect of the disclosure.

FIG. 3 is a flowchart of a method for wireless charging according toanother aspect of the disclosure.

FIG. 4 is a flowchart of a method for wireless charging according toanother aspect of the disclosure.

FIG. 5 is a block diagram of a wireless charging transmitter accordingto an aspect of the disclosure.

FIG. 6 is a block diagram of a wireless charging transmitter accordingto one example of an aspect of the disclosure.

FIG. 7 is a block diagram of a wireless charging receiver according toan aspect of the disclosure.

FIG. 8 is a block diagram of a wireless charging receiver according toone example of an aspect of the disclosure.

FIG. 9 is a block diagram of a power management apparatus according toan aspect of the disclosure.

FIG. 10 is a block diagram of a power management apparatus according toone example of an aspect of the disclosure.

DETAILED DESCRIPTION

Reference will now be made in detail to exemplary embodiments, examplesof which are illustrated in the accompanying drawings. The followingdescription refers to the accompanying drawings in which the samenumbers in different drawings represent the same or similar elementsunless otherwise represented. The implementations set forth in thefollowing description of exemplary embodiments do not represent allimplementations consistent with the present disclosure. Instead, theyare merely examples of apparatuses and methods consistent with aspectsrelated to the present disclosure as recited in the appended claims. Inthis disclosure, the term “in response to a condition” may mean when acondition is met.

FIG. 1 is a schematic diagram of a wireless charging system according toan aspect of the disclosure. As shown in FIG. 1, the wireless chargingsystem includes: a charger, a wireless charging transmitter (Txterminal), a wireless charging receiver (Rx terminal), and a powermanagement apparatus. The charger may be a PD charger that supports theUSB PD protocol. The charger and the wireless charging transmitter maybe connected using a C to C cable. The wireless charging transmitter mayinclude an inverter circuit, a communication and control circuit, and aTx coil. The inverter circuit may be a half-bridge inverter circuit or afull-bridge inverter circuit. The inverter circuit may be used toconvert a direct current to an alternating current. The communicationand control circuit may be used to control the inverter circuit, and mayalso be used to complete the PD communication with the charger. Inaddition, the communication and control circuit may be used to performFSK (Frequency Shift Keying) modulation on the wireless transmissionsignal, and may demodulate ASK (Amplitude Shift Keying) signal which isinputted by coupling of the Tx coil. The Tx coil may be used to generatea magnetic induction with a Rx coil of the wireless charging receiver,and send and receive wireless signals. The wireless charging receivermay include the Rx coil, a rectifier bridge, an LDO (Low DropoutRegulator), and a controller and communication circuit. Among them, theRx coil may be used to generate a magnetic induction with the Tx coil,and send and receive the wireless signals. The rectifier bridge may beused to convert the alternating current to the direct current. The LDOmay be used to output a stable voltage. An output terminal of the LDO isconnected to a wireless input channel of the power management apparatus.The controller and communication circuit may be used to control therectifier bridge, and may be used to perform ASK modulation on thewireless transmission signal and perform demodulation on the FSK signalwhich is inputted by coupling of the Rx coil, and may also be used tocommunicate with the power management apparatus. The power managementapparatus may be used to receive a wireless input of the wirelesscharging receiver, charge the battery, and may also be used to performI2C (Inter-Integrated Circuit) communication with the wireless chargingreceiver. The power management apparatus may be a power management chip,and may include a power management chip and a peripheral circuit, whichare not limited herein. The method for wireless charging of the wirelesscharging system will be described in detail below, and details are notdescribed herein again.

FIG. 2 is a flowchart of a method for wireless charging according to anaspect of the disclosure. The method is applied to a wireless chargingtransmitter. As shown in FIG. 2, the method includes steps S21 to S24.

In step S21, in response to an establishment of a connection from thewireless charging transmitter to a charger, voltage and currentcapability information of the charger is acquired. For example, whendetecting that a connection is established between the wireless chargingtransmitter and a charger, the wireless charging transmitter acquiresvoltage and current capability information of the charger in a handshakemessage.

The charger may be a PD charger. The wireless charging transmitter maybe connected to the charger via a Type C cable.

In this embodiment, after the connection between the wireless chargingtransmitter and the charger is established, the charger may send voltageand current capability (Source Capability) information of the charger tothe wireless charging transmitter, and the wireless charging transmittermay receive the voltage and current capability information of thecharger from the charger. The voltage and current capability informationmay include fixed PDO (Power Data Object) information and APDO(Augmented Power Data Object) information. For example, the fixed PDOinformation may be 5V/3 A, 9V/2 A, 12V/1.5 A, or the like. The APDOinformation may represent programmable voltage and current information,such as 3-5.9V/3 A and so on.

In a possible implementation manner, after acquiring the voltage andcurrent capability information of the charger, the wireless chargingtransmitter may record the voltage and current capability information ofthe charger.

In this embodiment, the wireless charging transmitter may determine thevoltage and current capability of the charger according to the voltageand current capability information of the charger. For example, thewireless charging transmitter may determine whether the charger meets arequirement of fast wireless charging according to the voltage andcurrent capability information of the charger and a voltage and currentrequirement corresponding to the requirement of fast wireless charging.If the charger meets the requirement of fast wireless charging, itindicates that the charger supports fast wireless charging; and if thecharger does not meet the requirement of fast wireless charging, itindicates that the charger does not support the fast wireless charging.

In a possible implementation manner, the wireless charging transmittermay send, to the charger, reception acknowledgment informationcorresponding to the voltage and current capability information inresponse to the received voltage and current capability information. Thereception acknowledgment information may be used to indicate that thewireless charging transmitter has successfully received the voltage andcurrent capability information of the charger. For example, thereception acknowledgment information may be GoodCRC information.

In a possible implementation manner, the method further includes:requesting, by the wireless charging transmitter, a first voltage to thecharger after the voltage and current capability information of thecharger is acquired. For example, the first voltage may be 5V.

In step S22, in response to fast wireless charge identificationinformation received from a wireless charging receiver, acknowledgmentinformation corresponding to the fast wireless charge identificationinformation is determined according to the voltage and currentcapability information of the charger. For example, when receiving fastwireless charge identification information from a wireless chargingreceiver, the wireless charging transmitter determines acknowledgmentinformation corresponding to the fast wireless charge identificationinformation according to the voltage and current capability informationof the charger.

In a possible implementation manner, the wireless charging transmittermay receive fast wireless charge identification information from the Rxcoil of the wireless charging receiver through the Tx coil. The fastwireless charge identification information received by the Tx coil isASK-modulated fast wireless charge identification information. Thewireless charging transmitter may demodulate the ASK-modulated fastwireless charge identification information through the communication andcontrol circuit module.

The acknowledgment information may be fast wireless chargeacknowledgment (Fast-charge-identification-ACK) information or normalwireless charge acknowledgment (Normal-charge-identification-ACK)information.

In a possible implementation manner, when the fast wireless chargeidentification information is received from the wireless chargingreceiver, the determination of the acknowledgment informationcorresponding to the fast wireless charge identification informationaccording to the voltage and current capability information of thecharger includes: demodulating, in response to fast wireless chargeidentification information received from the wireless charging receiver,the fast wireless charge identification information; if the fastwireless charge identification information is correctly demodulated andit is determined according to the voltage and current capabilityinformation of the charger that the charger satisfies a requirement offast wireless charging, determining the acknowledgment informationcorresponding to the fast wireless charge identification information asfast wireless charge acknowledgment information; and if the fastwireless charge identification information is correctly demodulated andit is determined according to the voltage and current capabilityinformation of the charger that the charger does not satisfy therequirement of fast wireless charging, determining the acknowledgmentinformation corresponding to the fast wireless charge identificationinformation as normal wireless charge acknowledgment information.

In a possible implementation manner, when the acknowledgment informationis the fast wireless charge acknowledgment information, theacknowledgment information may include the voltage and currentcapability information of the charger.

In step S23, the acknowledgment information is sent to the wirelesscharging receiver.

In step S24, in response to a charging request received from thewireless charging receiver in response to the acknowledgmentinformation, the charger is requested for a voltage and a currentcorresponding to the charging request. That is, in step S24, in responseto a charging request including desired voltage information and desiredcurrent information received from the wireless charging receiver, thecharger is requested for a voltage and a current corresponding to thedesired voltage information and the desired current information,respectively. For example, when receiving a charging request from thewireless charging receiver in response to the acknowledgmentinformation, the wireless charging transmitter sends a request to thecharger to request the charger to output a voltage and a currentcorresponding to the charging request.

The charging request may be a fast wireless charging request or a normalwireless charging request. When the charging request is the normalwireless charging request, the wireless charging system may operate inthe normal wireless charging mode, and the charging voltage of thenormal wireless charging mode may be 5V.

For example, if the charging request is a fast wireless charging requestand the voltage and the current corresponding to the charging requestare 9V/2 A, the wireless charging transmitter requests the voltage andcurrent of 9V/2 A from the charger to instruct the charger to output thevoltage and current of 9V/2 A. The charger responds to the chargingrequest of the wireless charging transmitter and outputs the voltage andcurrent of 9V/2 A. After the input voltage of the wireless chargingtransmitter is adjusted, the voltage rectified and outputted by thewireless charging receiver increases accordingly.

In a possible implementation manner, if the wireless chargingtransmitter cannot correctly demodulate the fast wireless chargeidentification information, the wireless charging transmitter does notsend the acknowledgment information to the wireless charging receiver.

In this embodiment, when detecting that a connection is established withthe charger, the wireless charging transmitter acquires the voltage andcurrent capability information of the charger; when the fast wirelesscharge identification information from the wireless charging receiver isreceived, the wireless charging transmitter determines theacknowledgment information corresponding to the fast wireless chargeidentification information according to the voltage and currentcapability information of the charger, sends the acknowledgmentinformation to the wireless charging receiver, and when the chargingrequest sent by the wireless charging receiver in response to theacknowledgment information is received, the wireless chargingtransmitter requests a voltage and a current corresponding to thecharging request from the charger. In this way, the wireless chargingprocess is optimized, and the flexibility of wireless charging isimproved. In this embodiment, the wireless charging transmitter mayperform a PD communication with the PD charger, and the wirelesscharging transmitter may further communicate with the PD chargeraccording to the charging request of the power management apparatus,thereby enabling the PD communication between the mobile terminal andthe wireless charging transmitter so as to perform an operation ofincreasing voltage and current, and thereby increasing the chargingpower.

FIG. 3 is a flowchart illustrating a method for wireless chargingaccording to another aspect of the disclosure. The method is applied toa wireless charging receiver. As shown in FIG. 3, the method includessteps S31 to S33.

In step S31, in response to fast wireless charge identificationinformation received from a power management apparatus, the fastwireless charge identification information is forwarded to a wirelesscharging transmitter.

In a possible implementation manner, when the wireless charging receiverreceives the fast wireless charge identification information from thepower management apparatus, the fast wireless charge identificationinformation may be ASK-modulated by the controller and communicationcircuit module, and the modulated fast wireless charge identificationinformation is transmitted to the Tx coil of the wireless chargingtransmitter via the Rx coil.

In step S32, in response to acknowledgment information received from thewireless charging transmitter in response to the fast wireless chargeidentification information, the acknowledgment information is forwardedto the power management apparatus.

In a possible implementation manner, if the wireless charging receiverreceives the acknowledgment information sent by the wireless chargingtransmitter in response to the fast wireless charge identificationinformation within a first time period after forwarding the fastwireless charge identification information to the wireless chargingtransmitter, the acknowledgment information may be fed back to the powermanagement apparatus via I2C. If the wireless charging receiver does notreceive the acknowledgment information sent by the wireless chargingtransmitter in response to the fast wireless charge identificationinformation within the first time period after forwarding the fastwireless charge identification information to the wireless chargingtransmitter, it may be determined that the wireless charging transmitterdoes not support the fast wireless charging.

In step S33, in response to a charging request received from the powermanagement apparatus in response to the acknowledgment information, thecharging request is forwarded to the wireless charging transmitter.

In a possible implementation manner, when the acknowledgment informationis fast wireless charge acknowledgment information, the charging requestis a fast wireless charging request; and when the acknowledgmentinformation is normal wireless charge acknowledgment information, thecharging request is a normal wireless charging request.

In a possible implementation manner, the method further includes:outputting, in response to detecting an establishment of a connectionfrom the wireless charging receiver to the wireless chargingtransmitter, a first voltage to the power management apparatus. Forexample, when the Rx terminal is placed on the Tx terminal, through themagnetic induction between the Rx coil and the Tx coil, it may bedetermined that the connection between the wireless charging receiverand the wireless charging transmitter is established. The wirelesscharging receiver may rectify and then output the first voltage to thewireless input channel of the power management apparatus. The firstvoltage may be 5V.

In this embodiment, when receiving the fast wireless chargeidentification information from the power management apparatus, thewireless charging receiver forwards the fast wireless chargeidentification information to the wireless charging transmitter; whenreceiving acknowledgment information sent by the wireless chargingtransmitter in response to the fast wireless charge identificationinformation, the wireless charging receiver forwards the acknowledgmentinformation to the power management apparatus; and when a chargingrequest sent by the power management apparatus in response to theacknowledgment information is received, the wireless charging receiverforwards the charging request to the wireless charging transmitter. Inthis way, the wireless charging process is optimized, the flexibility ofwireless charging is improved, and a PD communication between the mobileterminal and the wireless charging transmitter is enabled so as toperform the operation of boosting voltage and current, therebyincreasing the charging power.

FIG. 4 is a flowchart of a method for wireless charging according toanother aspect of the disclosure. The method is applied to a powermanagement apparatus, and the power management apparatus may be placedin a mobile terminal. As shown in FIG. 4, the method includes steps S41to S44.

In step S41, in response to detecting a first voltage input, fastwireless charge identification information is sent to the wirelesscharging receiver.

In this embodiment, when detecting that the first voltage exists in awireless input channel, the power management apparatus may send fastwireless charge identification (fast-charge-identification) informationto the wireless charging receiver to start the fast wireless chargeidentification process. The first voltage may be 5V.

In a possible implementation manner, the power management apparatus maycommunicate with the wireless charging receiver through the I2C and sendthe fast wireless charge identification information to the wirelesscharging receiver.

As an example of this implementation manner, the power managementapparatus may communicate with the controller and communication circuitmodule of the wireless charging receiver via the I2C, and send the fastwireless charge identification information to the controller andcommunication circuit module of the wireless charging receiver.

In step S42, a charging request is determined based on acknowledgmentinformation received from the wireless charging receiver, wherein theacknowledgment information is generated by the wireless chargingreceiver in response to the fast wireless charge identificationinformation.

In a possible implementation manner, the determining the chargingrequest according to the acknowledgment information includes: if theacknowledgment information is fast wireless charge acknowledgmentinformation, determining the charging request as a fast wirelesscharging request; and if the acknowledgment information is normalwireless charge acknowledgment information, determining the chargingrequest as a normal wireless charging request. In this implementationmanner, if the acknowledgment information received by the powermanagement apparatus is the fast wireless charge acknowledgmentinformation, the fast wireless charging (fast-charge-on) request may bedetermined according to the voltage and current capability informationof the charger carried in the acknowledgment information. The fastwireless charging request includes voltage and current informationrequired for charging. For example, the voltage and current informationrequired for charging is 9V/2 A. If the acknowledgment informationreceived by the power management apparatus is the normal wireless chargeacknowledgment information, it may be determined that the chargingrequest is a normal wireless charging (normal-charge-on) request.

In step S43, the charging request is sent to the wireless chargingreceiver.

In step S44, an input current of the power management apparatus is setaccording to the charging request and a charging efficiency.

For example, the voltage and current corresponding to the chargingrequest are 9V/2 A. The power management apparatus may set the currentof the wireless input of the power management apparatus to be 1.5 Aaccording to the current corresponding to the charging request and thecharging efficiency.

In a possible implementation manner, when receiving the acknowledgmentinformation sent by the wireless charging receiver in response to thefast wireless charge identification information, the determining thecharging request based on acknowledgment information received from thewireless charging receiver includes: determining the charging requestbased on the acknowledgment information received from the wirelesscharging receiver if the acknowledgment information is received within afirst time period after sending the fast wireless chargingidentification information.

In a possible implementation manner, after sending the fast wirelesscharge identification information to the wireless charging receiver, themethod further includes: determining the charging request as a normalwireless charging request if the acknowledgment information is notreceived within a first time period after sending the fast wirelesscharging identification information.

In this embodiment, when the first voltage input is detected by thepower management apparatus, the power management apparatus sends thefast wireless charge identification information to the wireless chargingreceiver; when receiving the acknowledgment information sent by thewireless charging receiver in response to the fast wireless chargeidentification information, the power management apparatus determines acharging request according to the acknowledgment information, sends thecharging request to the wireless charging receiver, and sets the inputcurrent of the power management apparatus according to the chargingrequest and the charging efficiency, thereby optimizing the wirelesscharging process and improving the flexibility of wireless charging, andenabling PD communication between the mobile terminal and the wirelesscharging transmitter so as to perform the operation of boosting voltageand current, thereby increasing the charging power.

FIG. 5 is a block diagram of a wireless charging transmitter accordingto an aspect of the disclosure. As shown in FIG. 5, the wirelesscharging transmitter includes: an acquiring module 51, a firstdetermining module 52, a first sending module 53, and a first requestingmodule 54.

The acquiring module 51 is configured to, in response to anestablishment of a connection from the wireless charging transmitter toa charger, acquire voltage and current capability information of thecharger.

The first determination module 52 is configured to, in response to fastwireless charge identification information received from a wirelesscharging receiver, determine acknowledgment information corresponding tothe fast wireless charge identification information according to thevoltage and current capability information of the charger.

The first sending module 53 is configured to send the acknowledgmentinformation to the wireless charging receiver.

The first requesting module 54 is configured to, in response to acharging request received from the wireless charging receiver inresponse to the acknowledgment information, request the charger for avoltage and a current corresponding to the charging request. Forexample, the first requesting module 54 may request the charger tooperate in a charging mode according to the voltage and a currentcorresponding to the charging request. The charging request may includethe normal wireless charging request and a fast wireless chargingrequest, where the two requests may require the charger to outputdifferent voltages and currents. Here, the first requesting module 54may request the charger to enable the fast charging mode when thecharging request received from the wireless charging receiver indicatesthat the fast charging mode is supported. When the charging requestindicates that the fast charging mode is not supported, the firstrequesting module 54 may request the charger to maintain the normalcharging mode. Additionally or alternatively, the first requestingmodule 54 may determine that the fast charging mode is not supportedwhen no ACK signal is received during a preset time period.

FIG. 6 is a block diagram of a wireless charging transmitter accordingto one example of an aspect of the disclosure.

As shown in FIG. 6, in a possible implementation manner, the firstdetermining module 52 includes a demodulation submodule 521, a firstdetermining submodule 522, and a second determining submodule 523.

The demodulation submodule 521 is configured to, in response to fastwireless charge identification information received from the wirelesscharging receiver, demodulate the fast wireless charge identificationinformation.

The first determining submodule 522 is configured to, if the fastwireless charge identification information is correctly demodulated thecharger satisfies a requirement of fast wireless charging according tothe voltage and current capability information of the charger, determinethe acknowledgment information corresponding to the fast wireless chargeidentification information as fast wireless charge acknowledgmentinformation.

The second determining submodule 523 is configured to, if the fastwireless charge identification information is correctly demodulated andthe charger does not satisfy the requirement of fast wireless chargingaccording to the voltage and current capability information of thecharger, determine the acknowledgment information corresponding to thefast wireless charge identification information as normal wirelesscharge acknowledgment information.

In a possible implementation manner, the wireless charging transmitterfurther includes a second requesting module 55.

The second requesting module 55 is configured to request the charger fora first voltage.

With respect to the wireless charging transmitter in the foregoingembodiment, a specific manner in which each module performs operationshas been described in detail in the embodiments related to the methods,which will not be elaborated herein.

In this embodiment, when the wireless charging transmitter detects thata connection is established with the charger, the voltage and currentcapability information of the charger is acquired; when receiving thefast wireless charge identification information from the wirelesscharging receiver, the wireless charging transmitter determines,according to the voltage and current capability information of thecharger, acknowledgment information corresponding to the fast wirelesscharge identification information, and sends the acknowledgmentinformation to the wireless charging receiver; and when receiving thecharging request sent by the wireless charging receiver in response tothe acknowledgment information, the wireless charging transmitterrequests a voltage and a current corresponding to the charging requestfrom the charger, thereby optimizing the wireless charging process,increasing the flexibility of wireless charging. In this embodiment, thewireless charging transmitter may perform PD communication with the PDcharger, and the wireless charging transmitter may further communicatewith the PD charger according to the charging request of the powermanagement apparatus, thereby enabling the mobile terminal to perform PDcommunication with the wireless charging transmitter so as to carry outthe boost up of the voltage and current, thereby increasing the chargingpower.

FIG. 7 is a block diagram of a wireless charging receiver according toan aspect of the disclosure. As shown in FIG. 7, the wireless chargingreceiver includes a first forwarding module 71, a second forwardingmodule 72, and a third forwarding module 73.

The first forwarding module 71 is configured to, in response to fastwireless charge identification information received from a powermanagement apparatus, forward the fast wireless charge identificationinformation to a wireless charging transmitter.

The second forwarding module 72 is configured to, in response toacknowledgment information received from the wireless chargingtransmitter in response to the fast wireless charge identificationinformation, forward the acknowledgment information to the powermanagement apparatus.

The third forwarding module 73 is configured to, in response to acharging request received from the power management apparatus inresponse to the acknowledgment information, forward the charging requestto the wireless charging transmitter.

In a possible implementation, when the acknowledgment information isfast wireless charge acknowledgment information, the charging request isa fast wireless charging request; and when the acknowledgmentinformation is normal wireless charge acknowledgment information, thecharging request is a normal wireless charging request.

FIG. 8 is a block diagram of a wireless charging receiver according toone example of an aspect of the disclosure. As shown in FIG. 8, thewireless charging receiver further includes an output module 74.

The output module 74 is configured to, in response to an establishmentof a connection from the wireless charging receiver to the wirelesscharging transmitter, output a first voltage to the power managementapparatus.

With regard to the wireless charging receiver in the foregoingembodiment, a specific manner in which each module performs operationshas been described in detail in the embodiments related to the methods,and a detailed description is not elaborated herein.

In this embodiment, when the wireless charging receiver receives thefast wireless charge identification information from the powermanagement apparatus, it forwards the fast wireless chargeidentification information to the wireless charging transmitter; whenreceiving the acknowledgment information sent by the wireless chargingtransmitter in response to the fast wireless charge identificationinformation, the wireless charging receiver forwards the acknowledgmentinformation to the power management apparatus; and when receiving acharging request sent by the power management apparatus in response tothe acknowledgment information, the wireless charging receiver forwardsthe charging request to the wireless charging transmitter, therebyoptimizing the wireless charging process, improving the flexibility ofwireless charging, enabling PD communication between the mobile terminaland the wireless charging transmitter so as to perform the operation ofboosting the voltage and the current, thereby increasing the chargingpower.

FIG. 9 is a block diagram of a power management apparatus according toan aspect of the disclosure. As shown in FIG. 9, the power managementapparatus includes: a second sending module 91, a second determiningmodule 92, a third sending module 93 and a setting module 94.

The second sending module 91 is configured to, in response to detectinga first voltage input, send fast wireless charge identificationinformation to a wireless charging receiver.

The second determination module 92 is configured to determine a chargingrequest based on acknowledgment information received from the wirelesscharging receiver, wherein the acknowledgment information is generatedby the wireless charging receiver in response to the fast wirelesscharge identification information.

The third sending module 93 is configured to send a charging request tothe wireless charging receiver.

The setting module 94 is configured to set an input current of the powermanagement apparatus according to the charging request and a chargingefficiency.

In a possible implementation manner, the second determining module 92 isconfigured to, when the acknowledgment information sent by the wirelesscharging receiver in response to the fast wireless charge identificationinformation is received within a first time period after sending thefast wireless charge identification information, determine the chargingrequest according to the acknowledgment information.

FIG. 10 is a block diagram of a power management apparatus according toan example of an aspect of the disclosure.

As shown in FIG. 10, in a possible implementation manner, the seconddetermining module 92 includes: a third determining submodule 921 and afourth determining submodule 922.

The third determining submodule 921 is configured to, if theacknowledgment information is fast wireless charge acknowledgmentinformation, determine the charging request as a fast wireless chargingrequest.

The fourth determining submodule 922 is configured to, if theacknowledgment information is normal wireless charge acknowledgmentinformation, determine the charging request as a normal wirelesscharging request.

In a possible implementation manner, the power management apparatusfurther includes a third determining module 95.

The third determining module 95 is configured to determine the chargingrequest as a normal wireless charging request if the acknowledgmentinformation is not received within a first time period after sending thefast wireless charge identification information.

With respect to the power management apparatus in the foregoingembodiment, a specific manner in which each module performs operationshas been described in detail in the embodiments related to the methods,which will not be elaborated herein. Each module or submodule in thedisclosure may be implemented at least partially by integrated circuitsand other hardware components.

In this embodiment, when the first voltage input is detected by thepower management apparatus, the power management apparatus sends thefast wireless charge identification information to the wireless chargingreceiver; when receiving the acknowledgment information sent by thewireless charging receiver in response to the fast wireless chargeidentification information, the power management apparatus determines acharging request according to the acknowledgment information, sends thecharging request to the wireless charging receiver, and sets the inputcurrent of the power management apparatus according to the chargingrequest and the charging efficiency. In this way, the wireless chargingprocess is optimized and the flexibility of wireless charging isimproved. Meanwhile, the PD communication between the mobile terminaland the wireless charging transmitter is enabled so as to perform theoperation of increasing voltage and current, thereby increasing thecharging power.

In an aspect of the disclosure, there is also provided acomputer-readable storage medium having stored thereon a computerprogram, which when executed by a processor, may implement theaforementioned method for wireless charging. The computer readablestorage medium may include a random access memory (RAM), a read-onlymemory (ROM), an electrically erasable programmable read-only memory(EEPROM), a flash memory or other memories, a CDROM, a digital versatiledisk or other optical or holographic media, magnetic cassettes, amagnetic tape, a magnetic disk storage or other data processing systemsor magnetic storage devices which can be accessed by a computing deviceand may be used for encoded information.

Other embodiments of the disclosure may be apparent to those skilled inthe art from consideration of the specification and practice of thedisclosure disclosed here. This application is intended to cover anyvariations, uses, or adoptions of the disclosure following the generalprinciples thereof and including such departures from the presentdisclosure as come within known or customary practice in the art. It isintended that the specification and examples be considered as exemplaryonly, with a true scope and spirit of the disclosure being indicated bythe following claims.

It will be appreciated that the present disclosure is not limited to theexact construction that has been described above and illustrated in theaccompanying drawings, and that various modifications and changes can bemade without departing from the scope thereof. It is intended that thescope of the present disclosure only be limited by the appended claims.

What is claimed is:
 1. A method for wireless charging, the method beingapplied to a wireless charging transmitter, comprising: when detectingthat a connection is established between the wireless chargingtransmitter and a charger, acquiring, by the wireless chargingtransmitter, voltage and current capability information of the charger;when receiving fast wireless charge identification information from awireless charging receiver, determining acknowledgment informationcorresponding to the fast wireless charge identification informationaccording to the voltage and current capability information of thecharger; sending, by the wireless charging transmitter, theacknowledgment information to the wireless charging receiver; and whenreceiving a charging request including desired voltage information anddesired current information from the wireless charging receiver,requesting the charger to output a voltage and a current respectivelycorresponding to the desired voltage information and the desired currentinformation.
 2. The method according to claim 1, wherein determining theacknowledgment information corresponding to the fast wireless chargeidentification information according to the voltage and currentcapability information of the charger comprising: demodulating, inresponse to fast wireless charge identification information receivedfrom the wireless charging receiver, the fast wireless chargeidentification information; determining, when the fast wireless chargeidentification information is correctly demodulated and the chargersatisfies a requirement of fast wireless charging according to thevoltage and current capability information of the charger, theacknowledgment information corresponding to the fast wireless chargeidentification information as fast wireless charge acknowledgmentinformation; and determining, when the fast wireless chargeidentification information is correctly demodulated and the charger doesnot satisfy the requirement of fast wireless charging according to thevoltage and current capability information of the charger, theacknowledgment information corresponding to the fast wireless chargeidentification information as normal wireless charge acknowledgmentinformation.
 3. The method according to claim 1, further comprising:requesting a first voltage from the charger after acquiring the voltageand current capability information of the charger.
 4. A method forwireless charging, the method being applied to a power managementapparatus, comprising: sending, in response to a wireless chargingtransmitter detecting a first voltage input after the wireless chargingtransmitter acquires voltage and current capability information of acharger, fast wireless charge identification information to a wirelesscharging receiver; determining a charging request based onacknowledgment information received from the wireless charging receiverand sent by the wireless charging transmitter, wherein theacknowledgment information is generated by the wireless chargingreceiver in response to the fast wireless charge identificationinformation; sending, from the power management apparatus, the chargingrequest to the wireless charging receiver; and setting an input currentof the power management apparatus according to the charging request anda charging efficiency.
 5. The method according to claim 4, determining acharging request based on acknowledgment information received from thewireless charging receiver comprising: determining the charging requestbased on the acknowledgment information received from the wirelesscharging receiver if the acknowledgment information is received within afirst time period after sending the fast wireless charge identificationinformation.
 6. The method according to claim 5, wherein the determiningthe charging request based on the acknowledgment information comprises:determining, when the acknowledgment information is fast wireless chargeacknowledgment information, the charging request as a fast wirelesscharging request; and determining, when the acknowledgment informationis normal wireless charge acknowledgment information, the chargingrequest as a normal wireless charging request.
 7. The method accordingto claim 5, further comprising: determining the charging request as anormal wireless charging request when the acknowledgment information isnot received within a first time period after sending the fast wirelesscharge identification information.
 8. The method according to claim 6,further comprising: determining the charging request as a normalwireless charging request when the acknowledgment information is notreceived within a first time period after sending the fast wirelesscharge identification information.
 9. A wireless charging systemcomprising a wireless charging transmitter, the wireless chargingtransmitter comprising: a processor; and a memory for storinginstructions executable by the processor, wherein the processor isconfigured to: when detecting that a connection is established betweenthe wireless charging transmitter and a charger, instruct the wirelesscharging transmitter to acquire voltage and current capabilityinformation of the charger; when receiving fast wireless chargeidentification information from a wireless charging receiver, determineacknowledgment information corresponding to the fast wireless chargeidentification information according to the voltage and currentcapability information of the charger; instruct the wireless chargingtransmitter to send the acknowledgment information to the wirelesscharging receiver; and when receiving a charging request from thewireless charging receiver in response to the acknowledgmentinformation, request the charger for a voltage and a currentcorresponding to the charging request.
 10. The wireless charging systemaccording to claim 9, wherein the processor is further configured to: inresponse to fast wireless charge identification information receivedfrom the wireless charging receiver, demodulate the fast wireless chargeidentification information; when the fast wireless charge identificationinformation is correctly demodulated and the charger satisfies arequirement of fast wireless charging according to the voltage andcurrent capability information of the charger, determine theacknowledgment information corresponding to the fast wireless chargeidentification information as fast wireless charge acknowledgmentinformation; and when the fast wireless charge identificationinformation is correctly demodulated and the charger does not satisfythe requirement of fast wireless charging according to the voltage andcurrent capability information of the charger, determine theacknowledgment information corresponding to the fast wireless chargeidentification information as normal wireless charge acknowledgmentinformation.
 11. The wireless charging system according to claim 9,wherein the processor is further configured to: request a first voltagefrom the charger.
 12. The wireless charging system according to claim 9,further comprising a power management apparatus, the power managementapparatus comprising: a management processor; and a management memoryfor storing instructions executable by the management processor, whereinthe management processor is configured to: in response to detecting afirst voltage input, send fast wireless charge identificationinformation to the wireless charging receiver; determine a chargingrequest based on acknowledgment information received from the wirelesscharging receiver, wherein the acknowledgment information is generatedby the wireless charging receiver in response to the fast wirelesscharge identification information; send the charging request to thewireless charging receiver; and set an input current of the powermanagement apparatus according to the charging request and a chargingefficiency.
 13. The wireless charging system according to claim 12,wherein the management processor is further configured to: determine thecharging request based on the acknowledgment information received fromthe wireless charging receiver if the acknowledgment information isreceived within a first time period after sending the fast wirelesscharge identification information.
 14. The wireless charging systemaccording to claim 13, wherein the management processor is furtherconfigured to: when the acknowledgment information is fast wirelesscharge acknowledgment information, determine the charging request as afast wireless charging request; and when the acknowledgment informationis normal wireless charge acknowledgment information, determine thecharging request as a normal wireless charging request.
 15. The wirelesscharging system according to claim 13, wherein the management processoris further configured to: determine the charging request as a normalwireless charging request when the acknowledgment information is notreceived within a first time period after sending the fast wirelesscharge identification information.
 16. The wireless charging systemaccording to claim 14, wherein the management processor is furtherconfigured to: determine the charging request as a normal wirelesscharging request when the acknowledgment information is not receivedwithin a first time period after sending the fast wireless chargeidentification information.